Truss pad and method of making the same



Nov. 29, 1927.

D. L. CHESTERMAN TRUSS PAD AND METHOD OF MAKING THE SAME Filed July 29,1926 I VENTOR: f 13m Patented Nov. 29, 1927.

DANA L. GHESTERMAN, 0F

'MAN-LEELAND 00., OF

PENNSYLVANIA.

TRUSS 1? Application filed July 29,

My invention relates to a new and useful truss pad, and the method ofmaking the same, truss pads may be mad whereby more durable and lastinge and at a considerable saving of time, labor, and material.

It has been the practice in making truss pads heretofore, to soonresilient spongy rubber plate, core, layer of soft, In so covering andthen to cover as well-as the metallic plate, with a pliable andwaterproof leather.

the truss pads with re a filler or core of to a metallic form the rubberfiller or leather it was necessary to 'form a bead around the edge ofthe truss pad.

manual operation, that This was done by a is, by taking a suitablebeading material such as twine, rope or the like, laying the beadingmater al around the edge, and sewing it together with thetwo leatherplies. tion it was necessary to the leather covers,

Due to this construcefi'ect the sewing of by a manual operation, whichconsumed a considerable amount of p the filler and folding the edgesthereof over time, and the result was not entirely satisfactory.

Moreover, it has been the practice, first separately to encase thesponge rubber filler encased metal plate, of the gauze-encased in acotton securing the gauzestitching together the gauze covers, around theperipheral edge of the metal plate. A

piece of pliable waterproof leather of a size the fr li sufficient tocover then provided witha ont of the filler, was mp peripheral bead,

by folding the edges thereof inwardly around a beading material andloosely stitching the turned-over edges of the leather, so as to encasetherein. This front Ie the beading material ather cover, having the limpperipheral bead encased loosely in the inturned edges to the filler,while a cover was applied over t thereof, was then applied thicker backleather he metal plate. The

limp beaded edge of the front leather cover was then "stitched by handto the edge of the back leather cover, throughout the peripheriesthereof, thus comp letely enclosing the the beaded PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO CHESTER PHILADELPHIA; PENNSYLVANIA, ACORPORATION OF 1926. Serial No. 125,649.

gauze encased filler and metal plate in the front and back leathercovers respectively.

The object of my invention is a truss pad. of simplified construction,and one which may be assembled more quickly, and without any hand sewingor stitching, with a minimum number of parts, and a minimum number ofoperations.

Accordingly my invention contemplates the provision. of a preformed andshaperetaining, relatively rigid bead, made by sewing or otherwisesecuring a beading material around the peripheral edge of a relativelyrigid and form-retaining piece of fibrous material, such as sizedburlap, buckrainete or the like.

My invention further contemplates securing this beaded piece ofform-retaining ma terial to the fiat base of a sponge, or other,resilient rubber filler or core, by adhesive or other means, applyingthe pliable and waterroof front leather cover over the front of thepre-formed and shape-retaining bead and securing thesame on the back ofthe burlap or bead-supporting sheet, by adhesive or other means. Themetal plate is then superimposed upon the turned-over edges of thefrontleather cover, on the flat base of the filler pad, and secured theretoby adhesive or other means. A back leather cover, of the same contour asthe metal plate, but slightly larger, is then superimposed upon themetal plate, and a row of stitches is passed through the overhangingedge of the backleather cover and through edge of the front leathercover, throughout the circumferences thereof, there by completelyencasing the filler and metal plate, to form a finished truss pad.

Due ing operation can be carried out 011 any suitable sewing machine,thereby further eliminating manual operations, reducing the time andcost of manufacture of the truss pads. I

For the purpose of illustrating my invention I have shown in theaccompanying to my novel construction, this stitch and thus.

drawings several forms thereof which are at present preferred by me,since the same have been found in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumentaliand secure to the ties of which my invention consists canbe variously arranged and organized and that my invention is not limitedto the precise arrangement and organization of the instrumentalities asherein shown and described.

In the accompanying drawings, in which like reference charactersindicate like parts.

Figure 1, represents a perspective view of form-retaining fibrous sheet,having the preformed peripheral bead; the first step in the making of mynovel truss pad.

Figure 2, represents a section on line 22, Figure 1 on a slightlyreduced scale, showing the manner in which the peripheral head isattached to the form-retaining fibrous sheet.

Figure 3, represents a perspective view of the moulded resilient spongerubber core or filler, having the beaded form-retaining fibrous materialadhesively secured to the flat back surface thereof, showing the secondstep in the making of my novel. truss pad.

Figure 4, represents a section on line l4 of Figure 3 on a slightlyreduced scale.

. Figure 5, represents a plan view of the back of the truss after thefront leather cover has been applied over the filler and the edgesthereof folded back over the bead and adhesively secured to theform-retain ing fibrous sheet; showing the third step in the making ofmy novel truss pad.

Figure 6, represents a section on line 66 of Figure 5, on a slightlyreduced scale.

Figure 7, represents a plan view of the metal back plate.

Figure 8, represents a perspective view of the completed truss pad of mynovel .con struetion, having the metal plate applied to the back of thepad and having the back leather cover superimposed thereon and securedto the front leather cover by a peripheral row of stitches; showing thefourth and last stepin the making of my novel truss pad.

Figure 9, represents a section on line 99 of Figure 8, on a slightlyreduced scale.

By my novel construction I provide a suitable piece of relatively rigidand formretaining piece of fibrous material 1, such a piece of sizedburlap, buckramete or the like, and of the desired dimensions andcontour peripheral edge thereof a shitable head 2, which may be formedof strands of cord or the like 3, encased in a suitable strip fabric 4,and sewed to the edge of the form-retaining material 1, by a row ofstitches 5, as shown in Figures 1 and 2. Byv this means there'isproduced a formretaining base 1, having at its edges a preformed bead,which will retain its shape 1, and adhesively secured thereto. The base,

with the filler or core 6 applied thereto, is shown in perspective Viewin Figure 3, and in section, on a reduced scale, in Figure 4.

The next. step is the application of the pliable and waterproof frontleather cover 7, over the front of the rubber filler or core 6, andfolding its edges around the bead 2 L and in back of the buckramete orburlap base 1, and also adhesively securing the turned-over edges to thebase 1, so as to retain the said front leather cover 7 fixed, while thetruss pad is finally assembled. The folded-over edge of the outerleather cover 7 is desi nated by the numeral 8, and is shown moreparticularly on anenlarged scale in Figure 5. 1 p

I next apply the metal form plate 9, also of the desired contour andsize, and of suitable thickness and rigidity, having suitable spaced andthreaded apertures 10 and a suitable .knob 11, by adhesively orotherwisesecuring it to the back of the burlap base 1,. as shown inFigure 9. The back leather cover 12 is then applied to the assembly,over the metal plate ,9, as shown in Figures 8 and 9, and the assemblyis then ready for the mach'me stitching operation. A single or doublerow of machine sewn stitches 13, is then applied through the backleather cover 12, and through the front leather cover 7, within theinner periphery of the bead 2. This row of stitches passes inside theinner circumference of the bead 2 and completes the truss pad, bydrawing the front leather cover 7 taut onto the rubber core'orfille-rfi, and thus completely encasing the filler, base, and metalplate, in a leather cover.

It will thus be seen that by my novel construction' and moreparticularly by the provision of the pre-formed, shape-retaining head 2,mounted upon a shaperret-aining fibrous backing material 1, I am enabledto produce a truss pad, without. any manual or hand sewing, rincetheparts to be sewed to gether and thus secured, arer-etained in position,without any manual efi'ort, while the stitches are applied. Moreover, bymy novel construction I not only minimize the number of manualoperations, but also reduce to a minimum the number of parts, by theelimination of the gauze casings about the filler ployed in truss pads.

It will now be apparent that I have devised a novel and usefulconstruction of truss pad andmethod of making the same which embodiesthe features of advantage enumerated as desirablein the statement oftheinvention and the above description, and while I have, in the presentinstance, shown and described a preferred embodiment there of which willgive in practice satisfactory and reliable results, it is to beunderstood that the same is susceptible of modification in variousparticulars without departing from the spirit or scope of the inventionor sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. The hereindescribed method of making truss pads, which consists informing a bead around the peripheral edge of a formretaining sheet,placing a resilient filler pad on one side of said form-retaining sheet,applying a pliable front cover over the filler pad, turning in the edgesof said pliable.

cover around the bead and securing the same to the other side of saidform-retaining sheet, applying a rigid plate to said other side of saidform-retaining sheet, applying a back cover over said rigid plate, andlastly fastening the front and back covers by a row of stitches passingthrough the peripheries of the two covers.

'2. The hereindescribed method of making truss pads, which consists insewing a bead onto one side of a form-retaining sheet, along theperipheral edge thereof, adhesively securing a resilient filler pad onone side of said form-retaining sheet, seated within said bead, applyinga pliable leather front cover over the filler pad, turning in the edgesof said pliable front cover around the bead and adhesively securing thesame to the other side of the form-retaining sheet, applying the rigidplate to said other side of said form-retaining sheet, superimposed uponthe turned-in edges of the pliableleather front cover, applying a backleather cover over said rigid plate, and lastly fastening the front andback leather covers, by a row of stitches passing through the peripheryof the back cover, and passing through the turned-in edge of the frontcover and through the front cover, around the inner periphery of thebead, thereby completely enclosing the filler pad, the form-retainingsheet and the rigid plate.

5. The hereindescribed method of making truss pads, which consists informing a head around the peripheral edge of a form-retaining sheet, byenveloping a suitable beading material in a suitable strip of fabric,and sewing the longitudinal edges of said strip fabric to the peripheraledge of said formretaining sheet, placing a resilient filler pad on oneside of said form-retaining sheet, seated within said bead, applying apliable front cover over the filler pad, turning in the edges ofsaidpliable front cover around the bead and adhesively securing the sameto the other side of said form-retaining sheet, applying a rigid plateto said other side of said form-retaining sheet, superimposed upon saidturned-in edges of said pliable front cover, applying a back cover oversaid rigid plate, and lastly fastenin the front and back covers by a rowof stitc es passing through the periphery of the back cover and pasingthrough the turned-in edge of the front cover and through said frontcover,

around the inner periphery of the bead, thereby completely enclosing thefiller pad, the form-retaining sheet and the rigid plate.

4. In a truss pad, a resilient filler pad having a base, a pre-formedshape retaining bead secured to the peripheral edge of the base thereof,a flexible cover extending over the filler Pad, a rigid platesuperimposed upon the base of said filler pad, a cover extending fromsaid rigid plate, a row of stitches extending through the peripheraledge of said second cover and through said first cover, around the innerperiphery of said bead, fastening the two covers together, therebycompletely encasing within them the filler pad, the pre-form'ed bead,and the rigid plate.

5. In a truss pad, a form-retaining sheet,

having a peripheral bead thereon, a resilient filler member on one sideof said sheet, a rigid plate on the other side thereof, a flexible coverextending over the resilient filler, a cover extending over the rigidplate, and a row of stitches extending around the inner periphery of thebead, and through said two covers, thereby to secure the two to eachother and to encase within them said filler, the form-retaining sheetand the rigid plate.

6. In a truss pad, a basesheet of relatively rigid material ofpredetermined contour, a preformed peripheral bead carried thereby, afiller pad on one side thereof, a metal plate on the other side thereof,a leather cover enclosing the filler pad and having its edges foldedback over the base sheet, a leather cover extending over the metalplate, and a row of stitches extending through the two leather coversand around the inner periphery of the bead, securing the two leathercovers together and enclosing within them, the filler, the base sheetand the metal plate.

7 In a trusspad, a form-retaining fibrous sheet having a peripheral headin one side thereof, a resilient rubber filler pad seated within saidbead and adhesively secured to said form-retaining fibrous sheet, andpliable leather front cover enveloping said pad and having its edgesfolded in, over said bead and adhesively secured to the other side ofsaid form-retaining fibrous sheet, a metal plate positioned upon saidother side of said fibrous sheet, superimposed upon the turned- (R eredge of said front leather cover, a back leather cover, superimposedupon said metal plate, and-a row 0f stitches passing through theperipheral edge of said hack leather cover, the turned over edge of saidfront leather cover and said front leather cover; around the innerperiphery of said bead, 10 securing said two leather covers to eachother, thereby completely encasin-g Within them the filler pad, the.fibrous sheet, the bead, and the metal plate.

DANA L. CHESTERMAN'."

